@charset "UTF-8";
:root{--ink:#19374d;--body:#344d60;--muted:#687b8b;--blue:#0874bc;--light:#f4f8fb;--line:#e1e9ef;--purple:#684bb0;--radius:10px;color-scheme:light;font-family:Arial,Helvetica,sans-serif;font-size:16px;scroll-behavior:smooth;scroll-padding-top:26px}
*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--body);line-height:1.65}button,a,input,summary{-webkit-tap-highlight-color:transparent}button{font:inherit}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #3b9cdc;outline-offset:5px}img{max-width:100%;height:auto}figure{margin:0}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--ink);line-height:1.25}h2{font-size:clamp(1.8rem,3vw,2.5rem);font-weight:500;letter-spacing:-.035em}h3{font-size:1.1rem;font-weight:600}sup{font-size:.65em;vertical-align:super;padding-left:2px}button:disabled{cursor:default}.container{width:min(1160px,calc(100% - 64px));margin-inline:auto}.section{padding-block:84px}.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-block:21px}.brand{display:inline-flex;align-items:center;gap:6px;color:var(--ink);font-size:1.3rem;font-weight:600;line-height:1}.brand:hover{text-decoration:none}.site-header nav{display:flex;gap:27px;font-size:.875rem}.site-header nav a{color:var(--body)}.hero{text-align:center;padding-top:40px}.wordmark{display:flex;align-items:center;justify-content:center;gap:12px;font:88px/1.05 Georgia,'Times New Roman',serif;color:var(--ink);letter-spacing:-4px;margin-bottom:18px}.wordmark img{width:82px;height:82px}.hero h1{font-size:clamp(1.8rem,3.1vw,2.65rem);font-weight:500;letter-spacing:-.035em;max-width:1060px;margin:0 auto 24px}.authors{display:flex;flex-wrap:wrap;justify-content:center;column-gap:19px;row-gap:3px;max-width:960px;margin:0 auto 10px;color:var(--ink)}.authors span{white-space:nowrap}.affiliations{display:flex;flex-wrap:wrap;justify-content:center;gap:1px 18px;max-width:880px;margin:0 auto;color:#647686;font-size:.8125rem}.affiliations span{white-space:nowrap}.author-notes{font-size:.75rem;color:var(--muted);margin:9px 0 22px}.author-notes span{margin-left:15px}.resource-links{display:flex;align-items:center;justify-content:center;gap:11px;flex-wrap:wrap;margin-bottom:36px}.button{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--line);padding:9px 16px;border-radius:7px;color:var(--ink);font-size:.875rem;background:#fff}.button:hover{border-color:#9dbed6;background:var(--light);text-decoration:none}.status{font-size:.75rem;color:var(--muted);padding-left:9px;border-left:1px solid var(--line)}.text-link{font-size:.875rem;margin-inline:8px}.demos{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding-bottom:62px}.demo{min-width:0}.demo video{display:block;width:100%;height:auto;aspect-ratio:16/9;background:#f8fafb;border-radius:var(--radius);border:1px solid var(--line)}.demo-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:15px}.demo-heading h2{font-size:1.25rem;letter-spacing:-.02em;margin:0;font-weight:600}.duration{font-size:.8125rem;color:var(--muted);font-variant-numeric:tabular-nums}.demo-description{font-size:.875rem;color:var(--muted);margin:7px 0 13px;max-width:520px}.chapters{display:flex;flex-wrap:wrap;gap:6px}.chapters button{display:inline-flex;gap:6px;font-size:.75rem;background:#fff;border:1px solid var(--line);border-radius:5px;color:var(--muted);padding:6px 8px;text-align:left;transition:background .15s}.chapters button:hover,.chapters button[aria-current=true]{background:#eaf4fc;color:var(--blue);border-color:#b8d8ef}.chapters span{color:var(--body)}.eyebrow{text-transform:uppercase;color:var(--blue);font-size:.75rem;letter-spacing:.13em;font-weight:600;margin-bottom:14px}.section-heading{max-width:760px;margin-bottom:34px}.section-heading h2{margin-bottom:15px}.section-heading p:not(.eyebrow){font-size:1.0625rem;line-height:1.75;margin-bottom:0}.section-heading strong{font-weight:600;color:var(--ink)}.release{border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:32px}.release h2{margin-bottom:14px}.release p:last-child{max-width:540px;margin:0;color:var(--muted)}.release-status{padding:11px 17px;border:1px solid var(--line);border-radius:7px;font-size:.875rem;white-space:nowrap}footer{display:flex;align-items:center;gap:24px;border-top:1px solid var(--line);padding-block:26px;color:var(--muted);font-size:.8125rem}footer .brand{margin-right:auto;font-size:1.05rem}.skip-link{position:absolute;top:10px;left:10px;transform:translateY(-150%);background:white;padding:12px;z-index:99}.skip-link:focus{transform:none}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
@media(max-width:800px){.container{width:calc(100% - 40px)}.section{padding-block:60px}.hero h1{max-width:760px}.authors{column-gap:14px;font-size:.875rem}.demos{gap:20px}.demo-description{font-size:.8125rem}.chapters button{font-size:.75rem}.desktop-break{display:none}}
@media(max-width:600px){.container{width:calc(100% - 36px)}.site-header{padding-block:17px;gap:12px}.site-header nav{gap:15px;font-size:.8125rem}.brand{font-size:1.1rem}.brand img{width:27px}.hero{padding-top:32px}.wordmark{font-size:67px;letter-spacing:-3px;margin-bottom:19px}.wordmark img{width:65px;height:65px}.hero h1{font-size:1.8rem;line-height:1.22}.authors{row-gap:4px;column-gap:14px}.affiliations{font-size:.75rem;column-gap:12px;margin-top:13px}.author-notes{font-size:.75rem;margin-bottom:22px}.demos{grid-template-columns:1fr;gap:34px;padding-bottom:42px}.demo-description{font-size:.875rem}.chapters button{padding:8px;min-height:36px}.section{padding-block:48px}.section-heading p:not(.eyebrow){font-size:1rem}.release{align-items:flex-start;flex-direction:column;gap:24px}.resource-links{gap:8px;margin-bottom:28px}.button{padding:9px 11px}.text-link{margin-inline:3px}}
.accent{color:var(--blue)!important}.method-section{background:linear-gradient(180deg,#f5f9fc 0,#fff 96%);border-top:1px solid var(--line)}.method-figure{background:white;padding:22px 20px 12px;border-radius:var(--radius)}.figure-link{display:block;border-radius:7px}.figure-link img{display:block;width:100%;height:auto}.figure-link:hover{cursor:zoom-in}.method-figure figcaption{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-top:15px;color:var(--muted);font-size:.8125rem}.method-figure figcaption span:last-child{font-size:.75rem}.method-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:31px}.method-notes h3{font-size:1rem;letter-spacing:-.015em;margin-bottom:9px}.method-notes h3 span{font-size:.8125rem;color:#9bafbf;font-weight:400;margin-right:6px}.method-notes p{font-size:.875rem;color:var(--muted);line-height:1.7;margin:0}.method-notes strong{color:var(--body);font-weight:500}.training-note{font-size:.875rem;color:var(--muted);border-top:1px solid var(--line);padding-top:23px;margin:29px 0 0}.training-note strong{font-weight:500;color:var(--ink)}.benchmark-grid{display:grid;grid-template-columns:1fr 1fr;gap:68px}.benchmark{border-top:1px solid var(--line);padding-top:25px;min-width:0}.benchmark-top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.benchmark-top h3{font-size:1.2rem;margin-bottom:4px;letter-spacing:-.01em}.benchmark-top p{font-size:.875rem;color:var(--muted);margin:0}.gain{color:var(--blue);background:#eaf4fc;border-radius:4px;padding:3px 8px;font-size:.8125rem;white-space:nowrap}.benchmark-number{font-size:4rem;line-height:1.2;letter-spacing:-.05em;color:var(--blue);font-weight:500;margin-block:19px 20px;font-variant-numeric:tabular-nums}.benchmark-number>span{font-size:2rem;margin-left:4px}.comparison{font-size:.875rem}.bar-row{display:grid;grid-template-columns:50px 1fr 58px;gap:14px;align-items:center;margin-top:10px}.model{color:var(--ink)}.bar-track{height:12px;background:#f0f4f7;border-radius:2px;overflow:hidden}.bar{width:var(--value);height:100%;border-radius:2px}.bar.vela{background:var(--blue)}.bar.baseline{background:#aabdc9}.bar-value{text-align:right;font-variant-numeric:tabular-nums}.bar-scale{display:flex;justify-content:space-between;margin:7px 72px 0 64px;color:var(--muted);font-size:.75rem}.metric-note{font-size:.8125rem;color:var(--muted);line-height:1.7;margin:24px 0}.disclosure{border-block:1px solid var(--line);margin-top:30px}.disclosure summary{cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;color:var(--ink);padding:20px 0;font-size:.9375rem;list-style:none;min-height:60px}.disclosure summary::-webkit-details-marker{display:none}.disclosure summary>span{font-size:1.5rem;font-weight:400;line-height:1;transition:transform .15s}.disclosure[open] summary>span{transform:rotate(45deg)}.disclosure-body{padding-bottom:28px}.table-scroll{overflow-x:auto;margin-bottom:28px}table{border-collapse:collapse;width:100%;font-size:.875rem;white-space:nowrap;text-align:right;font-variant-numeric:tabular-nums}caption{text-align:left;color:var(--ink);font-weight:600;margin:5px 0 14px}th,td{padding:10px 13px;border-bottom:1px solid var(--line)}th:first-child{text-align:left}thead th{font-weight:600;color:var(--muted);font-size:.8125rem;background:#f7f9fb}tbody th{font-weight:400}.ours{background:#eff7fd;color:#0868a6;font-weight:600}.ours th{font-weight:600}.real-results{margin-top:59px}.subsection-heading h3{font-size:1.45rem;font-weight:500;letter-spacing:-.025em;margin-bottom:7px}.subsection-heading p{color:var(--muted);font-size:.875rem;margin-bottom:27px}.real-grid{display:grid;grid-template-columns:1fr 1fr;gap:35px}.real-grid figure{min-width:0}.real-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:21px}.real-heading h4{font-size:1rem;color:var(--ink);font-weight:500;margin:0}.real-heading>span{font-size:2rem;letter-spacing:-.04em;color:var(--purple)}.real-heading small{font-size:1rem;margin-left:2px}.figure-gallery{display:grid;gap:40px;padding-top:15px}.figure-gallery figure h3{font-size:1rem;margin-bottom:18px}.paper-section{border-top:1px solid var(--line);padding-block:54px;display:flex;justify-content:space-between;gap:30px;align-items:center}.paper-section h2{font-size:1.8rem;margin-bottom:12px}.paper-section p:last-child{margin:0;color:var(--muted)}.paper-section .eyebrow{margin-bottom:8px}.citation{padding-bottom:64px}.citation .disclosure{margin-top:0}.citation-top{display:flex;align-items:center;justify-content:space-between;gap:25px}.citation-top p{font-size:.875rem;color:var(--muted);margin-bottom:0}.citation-top button{white-space:nowrap}pre{margin-block:22px;white-space:pre-wrap;overflow-wrap:anywhere;background:var(--light);padding:23px;border-radius:7px;font: .8125rem/1.8 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--body)}dialog{border:0;border-radius:12px;padding:25px;max-width:min(1500px,94vw);width:94vw;max-height:92vh;color:var(--body);box-shadow:0 20px 100px #0003}dialog::backdrop{background:#122638b8;backdrop-filter:blur(5px)}.dialog-top{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:25px;font-size:.875rem;color:var(--muted)}#dialog-image{display:block;max-width:100%;max-height:68vh;object-fit:contain;margin:auto}#dialog-caption{font-size:.875rem;color:var(--muted);max-width:900px;margin:20px auto 0;text-align:center}
@media(max-width:800px){.benchmark-grid{gap:35px}.method-notes{gap:20px}.method-notes h3{font-size:.9375rem}.real-grid{gap:25px}.method-figure{padding:14px}.method-figure figcaption span:last-child{display:none}}
@media(max-width:600px){.method-notes{grid-template-columns:1fr;gap:21px}.method-notes h3{font-size:1rem;margin-bottom:5px}.method-notes p{max-width:460px}.method-figure{padding:10px 7px}.method-figure figcaption{font-size:.75rem;line-height:1.6}.benchmark-grid{grid-template-columns:1fr;gap:34px}.benchmark-number{font-size:3.7rem;margin-block:15px}.metric-note{font-size:.75rem}.real-grid{grid-template-columns:1fr;gap:30px}.real-heading{margin-bottom:13px}.real-results{margin-top:44px}.real-heading h4{font-size:1.0625rem}.paper-section{align-items:flex-start;flex-direction:column;padding-block:42px;gap:21px}.paper-section p:last-child{font-size:.875rem}.release p:last-child{font-size:.875rem}.citation{padding-bottom:42px}.citation-top{align-items:flex-start;flex-direction:column;gap:14px}pre{padding:16px;font-size:.75rem}dialog{padding:15px}#dialog-caption{font-size:.8125rem}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*{transition:none!important}}

/* Review refinements: visual hierarchy and open result narratives. */
.resource-pending{cursor:default}.resource-pending:hover{background:#fff;border-color:var(--line)}
.chapters{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;align-items:stretch}
.chapters button{justify-content:center;align-items:center;text-align:center;padding:9px 5px;font-size:.8125rem;gap:5px;line-height:1.4;min-height:40px}
.chapters button[aria-busy=true]{background:#eaf4fc;border-color:#80b7dc}
.video-status{font-size:.8125rem;line-height:1.5;color:var(--blue);margin:8px 0 0}.video-status:empty{display:none}
.method-section .section-heading{max-width:none}.method-section .section-heading p:not(.eyebrow){font-size:1.0625rem}
.method-figure figcaption{align-items:center;gap:12px;padding-block:8px 5px}
.method-motto{font:italic 1.65rem/1.4 Georgia,'Times New Roman',serif;letter-spacing:-.035em;color:var(--ink)}
.method-motto em{color:var(--blue);font-style:inherit}.method-figure figcaption .figure-hint{display:inline-flex;align-items:center;gap:8px;border:0;padding:3px 0;background:transparent;color:var(--muted);font-size:.75rem;font-style:normal;letter-spacing:0;white-space:nowrap}.figure-hint svg{flex-shrink:0;padding:6px;border-radius:50%;background:#edf5fb;color:var(--blue)}.figure-hint:hover{color:var(--blue)}.figure-hint:hover svg{background:#dceefa}
.method-notes{gap:0;margin-top:36px}.method-notes>div{--note-accent:#0874bc;background:none;border:0;border-radius:0;padding:12px 28px 16px}.method-notes>div:first-child{padding-left:0}.method-notes>div:last-child{padding-right:0}.method-notes>div+div{border-left:1px solid #dce6ed}
.method-notes>div:nth-child(2){--note-accent:#237d80}.method-notes>div:nth-child(3){--note-accent:#7254a8}
.method-notes h3{font-size:1.0625rem;color:var(--note-accent);line-height:1.45;margin-bottom:13px}.method-notes h3 span{display:flex;align-items:center;gap:10px;font-size:.8125rem;font-weight:600;letter-spacing:.08em;color:var(--note-accent);opacity:.7;margin-bottom:10px}.method-notes h3 span::after{content:"";width:27px;height:1px;background:currentColor;opacity:.55}
.method-notes p{font-size:1rem;color:var(--body);line-height:1.65}.method-notes strong{color:var(--note-accent);font-weight:600}
.real-results{margin-top:38px}.task-sequences{display:grid;grid-template-columns:1fr;gap:32px;margin-top:48px}.task-sequences figure{display:grid;grid-template-columns:180px minmax(0,1fr);align-items:center;gap:34px;min-width:0}.task-sequences figure+figure{border-top:1px solid var(--line);padding-top:32px}.task-sequences h3{max-width:none;font-weight:400;letter-spacing:0;margin:0;color:var(--ink)}.sequence-kicker{display:block;color:var(--muted);font:500 .75rem/1.5 Arial,Helvetica,sans-serif;letter-spacing:.1em;text-transform:uppercase;margin-bottom:13px}.sequence-name{display:block;color:#265a7b;font:italic 2rem/1.2 Georgia,"Times New Roman",serif;letter-spacing:-.035em}
.simulation-results{border-top:1px solid var(--line);margin-top:62px;padding-top:53px}.simulation-results .subsection-heading p{margin-bottom:20px}
.comparison-note{max-width:1000px;font-size:1rem;line-height:1.75;margin:0 0 30px;color:var(--muted)}.comparison-note strong{color:var(--ink);font-weight:500}
.simulation-analysis{padding-top:44px;gap:47px}.simulation-analysis figure h3{font-size:1.125rem;margin-bottom:23px}
.analysis-caption{font-size:.9375rem;color:var(--muted);line-height:1.7;margin-top:23px}.analysis-caption p{margin-bottom:0}.analysis-caption strong{font-weight:600;color:var(--ink)}
.citation{border-top:1px solid var(--line);padding-block:45px 60px}.citation-top h2{font-size:1.8rem;margin:0}.citation-top{gap:20px}.citation .text-link{margin-inline:0}
#dialog-title{font-size:1rem;font-weight:600;color:var(--ink)}#dialog-caption{font-size:1rem;text-align:left;max-width:1120px;line-height:1.75;color:var(--body);background:#f4f7fa;border:1px solid #e7edf2;border-radius:10px;padding:22px 26px;margin-top:26px}#dialog-caption p{margin:0 0 15px}#dialog-caption p:last-child{margin-bottom:0}#dialog-caption strong{font-weight:600;color:var(--ink)}
@media(max-width:1000px) and (min-width:601px){.chapters button{flex-direction:column;gap:1px;font-size:.8125rem}.method-notes>div{padding:12px 20px 16px}}
@media(max-width:800px){.method-motto{font-size:1.4rem}.method-notes p{font-size:.9375rem}.task-sequences{gap:26px}.task-sequences figure{grid-template-columns:140px minmax(0,1fr);gap:22px}.sequence-name{font-size:1.7rem}.sequence-kicker{letter-spacing:.06em;font-size:.75rem}.method-notes h3{font-size:1rem}}
@media(max-width:600px){.chapters{gap:5px}.chapters button{flex-direction:column;gap:3px;padding:7px 3px;font-size:.8125rem;min-height:58px}.method-section .section-heading p:not(.eyebrow){font-size:1rem}.method-motto{font-size:1.22rem;line-height:1.5}.method-notes{gap:0}.method-notes>div{padding:22px 0}.method-notes>div+div{border-left:0;border-top:1px solid #dce6ed}.method-notes h3 span{display:inline;margin-right:8px}.method-notes h3 span::after{display:none}.method-notes h3{margin-bottom:9px}.method-notes p{font-size:1rem}.task-sequences{gap:25px;margin-top:35px}.task-sequences figure{grid-template-columns:1fr;gap:15px}.task-sequences figure+figure{padding-top:25px}.sequence-name{font-size:1.65rem}.sequence-name br{display:none}.sequence-kicker{margin-bottom:7px}.simulation-results{margin-top:43px;padding-top:36px}.comparison-note{font-size:.9375rem}.simulation-analysis{padding-top:30px;gap:36px}.analysis-caption{font-size:.875rem}.citation{padding-block:35px 42px}.citation-top{flex-direction:row;align-items:center}#dialog-caption{font-size:.9375rem;padding:18px 16px;margin-top:20px}#dialog-title{font-size:.9375rem}}

/* Benchmark details: clear metric groups and a stable model column. */
.table-card{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;margin:7px 0 30px}
.table-title{display:flex;align-items:baseline;flex-wrap:wrap;gap:7px 18px;padding:19px 22px 17px;border-bottom:1px solid var(--line)}
.table-title h4{margin:0;font-size:1.0625rem;font-weight:600;letter-spacing:-.015em;color:var(--ink)}.table-title>span{font-size:.8125rem;color:var(--muted)}
.table-card .table-scroll{margin:0;scrollbar-width:thin;scrollbar-color:#bdcedb #f4f7fa}.table-scroll:focus-visible{outline:2px solid #3b9cdc;outline-offset:-2px}
.benchmark-table{table-layout:fixed;border-collapse:separate;border-spacing:0;min-width:680px;font-size:.875rem}
.benchmark-table th,.benchmark-table td{padding:11px 14px;line-height:1.45}.benchmark-table tr:not(.metric-head)>:first-child{width:210px;text-align:left}
.benchmark-table thead th{font-size:.8125rem;line-height:1.4;color:#526c80;background:#f7f9fb;font-weight:600}
.benchmark-table thead>tr:first-child th{padding-block:14px}.benchmark-table tbody th{color:var(--ink)}
.benchmark-table tbody tr:last-child>*{border-bottom:0}.benchmark-table .summary-cell{border-left:1px solid #dbe7ef;background:#f4f8fb;font-weight:600}.benchmark-table .summary-tail{background:#f4f8fb;font-weight:600}
.benchmark-table .reference-row th{font-weight:600}.benchmark-table .family-start>*{border-top:1px solid #c2d5e3}
.benchmark-table .ours>*{background:#edf6fd;color:#0868a6;font-weight:600}.benchmark-table .ours>:first-child{box-shadow:inset 3px 0 var(--blue)}.benchmark-table .ours .summary-cell,.benchmark-table .ours .summary-tail{background:#e3f0fb}
.ebench-table{min-width:900px}.ebench-table thead>tr:first-child th:not(:first-child){text-align:center;border-left:1px solid var(--line)}.ebench-table .group-start{border-left:1px solid var(--line)}.ebench-table .metric-head th{text-align:right;font-size:.75rem;font-weight:500;padding-block:7px 9px}
@media(hover:hover){.benchmark-table tbody tr:not(.ours):hover>*{background:#f2f7fb}}
@media(max-width:800px){.benchmark-table tr:not(.metric-head)>:first-child{width:168px}.benchmark-table th,.benchmark-table td{padding-inline:12px}.benchmark-table tr:not(.metric-head)>:first-child{position:sticky;left:0;z-index:1;background:#fff;box-shadow:1px 0 #dce6ee}.benchmark-table thead tr:not(.metric-head)>:first-child{background:#f7f9fb;z-index:2}.ebench-table .metric-head>:first-child{position:static;width:auto;box-shadow:none}.benchmark-table .ours>:first-child{background:#edf6fd;box-shadow:inset 3px 0 var(--blue),1px 0 #dce6ee}.table-title{padding:17px 16px 15px}}

/* Inline project name, echoing the serif Vela wordmark. */
.vela-name{font-family:Georgia,"Times New Roman",serif;font-style:italic;font-weight:700;font-size:1.04em;letter-spacing:.01em;line-height:inherit;white-space:nowrap;color:var(--blue)}